..." 11 July 2024 - According to the World Population Prospects 2024: Summary of Results published today, it is expected that the world’s population will peak in the mid-2080s, growing over the next sixty years from 8.2 billion people in 2024 to around 10.3 billion in the mid-2080s, and then will return to around 10.2 billion by the end of the century. The size of the world’s population in 2100 is now expected to be six per cent lower—or 700 million fewer—than anticipated a decade ago. "...
https://www.un.org/en/UN-projects-world-population-to-peak-within-this-centuryMost famous ecologists---by ranking-- have their own ideas and others about humanities future.